#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <pthread.h>
#include "mutex.hpp"

using namespace myMutex;
int ticket = 1000;
Mutex mutex;
void *route(void *arg)
{
    MutexGuard mgd(mutex);
    char *id = (char *)arg;
    while (1)
    {
        if (ticket > 0)
        {
            usleep(1000);
            printf("%s sells ticket:%d\n", id, ticket);
            ticket--;
        }
        else
        {
            break;
        }
    }
    return nullptr;
}
int main(void)
{
    pthread_t t1, t2, t3, t4;
    pthread_create(&t1, NULL, route, (void *)"thread 1");
    pthread_create(&t2, NULL, route, (void *)"thread 2");
    pthread_create(&t3, NULL, route, (void *)"thread 3");
    pthread_create(&t4, NULL, route, (void *)"thread 4");
    pthread_join(t1, NULL);
    pthread_join(t2, NULL);
    pthread_join(t3, NULL);
    pthread_join(t4, NULL);
}

// 条件变量的使用
//  #include <stdio.h>
//  #include <stdlib.h>
//  #include <string.h>
//  #include <unistd.h>
//  #include <pthread.h>
//  #include <sched.h>

// int ticket = 0;
// pthread_mutex_t mutex;
// pthread_cond_t cond = PTHREAD_COND_INITIALIZER;

// void *route(void *arg)
// {
//     char *id = (char *)arg;
//     while (1)
//     {
//         pthread_mutex_lock(&mutex);
//         if (ticket > 0)
//         {
//             usleep(1000);
//             printf("%s sells ticket:%d\n", id, ticket);
//             ticket--;
//             pthread_mutex_unlock(&mutex);
//         }
//         else
//         {
//             printf("%s wait on cond!\n", id);
//             pthread_cond_wait(&cond, &mutex); //醒来的时候，会重新申请锁！！
//             printf("%s 被叫醒了\n", id);
//         }
//         pthread_mutex_unlock(&mutex);
//     }
//     return nullptr;
// }

// int main(void)
// {
//     pthread_t t1, t2, t3, t4;

//     pthread_mutex_init(&mutex, NULL);

//     pthread_create(&t1, NULL, route, (void *)"thread 1");
//     pthread_create(&t2, NULL, route, (void *)"thread 2");
//     pthread_create(&t3, NULL, route, (void *)"thread 3");
//     pthread_create(&t4, NULL, route, (void *)"thread 4");

//     int cnt = 10;

//     while(true)
//     {
//         sleep(5);
//         ticket += cnt;
//         printf("主线程放票喽, ticket: %d\n", ticket);
//         pthread_cond_signal(&cond);
//     }

//     pthread_join(t1, NULL);
//     pthread_join(t2, NULL);
//     pthread_join(t3, NULL);
//     pthread_join(t4, NULL);
//     pthread_mutex_destroy(&mutex);
// }